| 1 | // xImaSel.cpp : Selection functions
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| 2 | /* 07/08/2001 v1.00 - Davide Pizzolato - www.xdp.it
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| 3 | * CxImage version 6.0.0 02/Feb/2008
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| 4 | */
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| 5 |
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| 6 | #include "ximage.h"
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| 7 |
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| 8 | #if CXIMAGE_SUPPORT_SELECTION
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| 9 |
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| 10 | ////////////////////////////////////////////////////////////////////////////////
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| 11 | /**
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| 12 | * Checks if the image has a valid selection.
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| 13 | */
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| 14 | bool CxImage::SelectionIsValid()
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| 15 | {
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| 16 | return pSelection!=0;
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| 17 | }
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| 18 | ////////////////////////////////////////////////////////////////////////////////
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| 19 | /**
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| 20 | * Gets the smallest rectangle that contains the selection
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| 21 | */
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| 22 | void CxImage::SelectionGetBox(RECT& r)
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| 23 | {
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| 24 | memcpy(&r,&info.rSelectionBox,sizeof(RECT));
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| 25 | }
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| 26 | ////////////////////////////////////////////////////////////////////////////////
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| 27 | /**
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| 28 | * Empties the selection.
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| 29 | */
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| 30 | bool CxImage::SelectionClear(BYTE level)
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| 31 | {
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| 32 | if (pSelection){
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| 33 | if (level==0){
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| 34 | memset(pSelection,0,head.biWidth * head.biHeight);
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| 35 | info.rSelectionBox.left = head.biWidth;
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| 36 | info.rSelectionBox.bottom = head.biHeight;
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| 37 | info.rSelectionBox.right = info.rSelectionBox.top = 0;
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| 38 | } else {
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| 39 | memset(pSelection,level,head.biWidth * head.biHeight);
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| 40 | info.rSelectionBox.right = head.biWidth;
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| 41 | info.rSelectionBox.top = head.biHeight;
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| 42 | info.rSelectionBox.left = info.rSelectionBox.bottom = 0;
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| 43 | }
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| 44 | return true;
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| 45 | }
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| 46 | return false;
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| 47 | }
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| 48 | ////////////////////////////////////////////////////////////////////////////////
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| 49 | /**
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| 50 | * Allocates an empty selection.
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| 51 | */
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| 52 | bool CxImage::SelectionCreate()
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| 53 | {
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| 54 | SelectionDelete();
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| 55 | pSelection = (BYTE*)calloc(head.biWidth * head.biHeight, 1);
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| 56 | return (pSelection!=0);
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| 57 | }
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| 58 | ////////////////////////////////////////////////////////////////////////////////
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| 59 | /**
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| 60 | * Deallocates the selction.
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| 61 | */
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| 62 | bool CxImage::SelectionDelete()
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| 63 | {
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| 64 | if (pSelection){
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| 65 | free(pSelection);
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| 66 | pSelection=NULL;
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| 67 | }
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| 68 | info.rSelectionBox.left = head.biWidth;
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| 69 | info.rSelectionBox.bottom = head.biHeight;
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| 70 | info.rSelectionBox.right = info.rSelectionBox.top = 0;
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| 71 | return true;
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| 72 | }
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| 73 | ////////////////////////////////////////////////////////////////////////////////
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| 74 | /**
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| 75 | * Checks if the coordinates are inside the selection.
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| 76 | */
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| 77 | bool CxImage::SelectionIsInside(long x, long y)
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| 78 | {
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| 79 | if (IsInside(x,y)){
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| 80 | if (pSelection==NULL) return true;
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| 81 | return pSelection[x+y*head.biWidth]!=0;
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| 82 | }
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| 83 | return false;
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| 84 | }
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| 85 | ////////////////////////////////////////////////////////////////////////////////
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| 86 | /**
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| 87 | * Checks if the coordinates are inside the selection.
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| 88 | * "blind" version assumes that (x,y) is inside to the image.
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| 89 | */
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| 90 | bool CxImage::BlindSelectionIsInside(long x, long y)
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| 91 | {
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| 92 | #ifdef _DEBUG
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| 93 | if (!IsInside(x,y))
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| 94 | #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
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| 95 | throw 0;
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| 96 | #else
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| 97 | return 0;
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| 98 | #endif
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| 99 | #endif
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| 100 | if (pSelection==NULL) return true;
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| 101 | return pSelection[x+y*head.biWidth]!=0;
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| 102 | }
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| 103 | ////////////////////////////////////////////////////////////////////////////////
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| 104 | /**
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| 105 | * Adds a rectangle to the existing selection.
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| 106 | */
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| 107 | bool CxImage::SelectionAddRect(RECT r, BYTE level)
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| 108 | {
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| 109 | if (pSelection==NULL) SelectionCreate();
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| 110 | if (pSelection==NULL) return false;
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| 111 |
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| 112 | RECT r2;
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| 113 | if (r.left<r.right) {r2.left=r.left; r2.right=r.right; } else {r2.left=r.right ; r2.right=r.left; }
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| 114 | if (r.bottom<r.top) {r2.bottom=r.bottom; r2.top=r.top; } else {r2.bottom=r.top ; r2.top=r.bottom; }
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| 115 |
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| 116 | if (info.rSelectionBox.top <= r2.top) info.rSelectionBox.top = max(0L,min(head.biHeight,r2.top+1));
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| 117 | if (info.rSelectionBox.left > r2.left) info.rSelectionBox.left = max(0L,min(head.biWidth,r2.left));
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| 118 | if (info.rSelectionBox.right <= r2.right) info.rSelectionBox.right = max(0L,min(head.biWidth,r2.right+1));
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| 119 | if (info.rSelectionBox.bottom > r2.bottom) info.rSelectionBox.bottom = max(0L,min(head.biHeight,r2.bottom));
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| 120 |
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| 121 | long ymin = max(0L,min(head.biHeight,r2.bottom));
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| 122 | long ymax = max(0L,min(head.biHeight,r2.top+1));
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| 123 | long xmin = max(0L,min(head.biWidth,r2.left));
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| 124 | long xmax = max(0L,min(head.biWidth,r2.right+1));
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| 125 |
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| 126 | for (long y=ymin; y<ymax; y++)
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| 127 | memset(pSelection + xmin + y * head.biWidth, level, xmax-xmin);
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| 128 |
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| 129 | return true;
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| 130 | }
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| 131 | ////////////////////////////////////////////////////////////////////////////////
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| 132 | /**
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| 133 | * Adds an ellipse to the existing selection.
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| 134 | */
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| 135 | bool CxImage::SelectionAddEllipse(RECT r, BYTE level)
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| 136 | {
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| 137 | if (pSelection==NULL) SelectionCreate();
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| 138 | if (pSelection==NULL) return false;
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| 139 |
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| 140 | long xradius = abs(r.right - r.left)/2;
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| 141 | long yradius = abs(r.top - r.bottom)/2;
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| 142 | if (xradius==0 || yradius==0) return false;
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| 143 |
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| 144 | long xcenter = (r.right + r.left)/2;
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| 145 | long ycenter = (r.top + r.bottom)/2;
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| 146 |
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| 147 | if (info.rSelectionBox.left > (xcenter - xradius)) info.rSelectionBox.left = max(0L,min(head.biWidth,(xcenter - xradius)));
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| 148 | if (info.rSelectionBox.right <= (xcenter + xradius)) info.rSelectionBox.right = max(0L,min(head.biWidth,(xcenter + xradius + 1)));
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| 149 | if (info.rSelectionBox.bottom > (ycenter - yradius)) info.rSelectionBox.bottom = max(0L,min(head.biHeight,(ycenter - yradius)));
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| 150 | if (info.rSelectionBox.top <= (ycenter + yradius)) info.rSelectionBox.top = max(0L,min(head.biHeight,(ycenter + yradius + 1)));
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| 151 |
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| 152 | long xmin = max(0L,min(head.biWidth,xcenter - xradius));
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| 153 | long xmax = max(0L,min(head.biWidth,xcenter + xradius + 1));
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| 154 | long ymin = max(0L,min(head.biHeight,ycenter - yradius));
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| 155 | long ymax = max(0L,min(head.biHeight,ycenter + yradius + 1));
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| 156 |
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| 157 | long y,yo;
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| 158 | for (y=ymin; y<min(ycenter,ymax); y++){
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| 159 | for (long x=xmin; x<xmax; x++){
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| 160 | yo = (long)(ycenter - yradius * sqrt(1-pow((float)(x - xcenter)/(float)xradius,2)));
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| 161 | if (yo<y) pSelection[x + y * head.biWidth] = level;
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| 162 | }
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| 163 | }
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| 164 | for (y=ycenter; y<ymax; y++){
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| 165 | for (long x=xmin; x<xmax; x++){
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| 166 | yo = (long)(ycenter + yradius * sqrt(1-pow((float)(x - xcenter)/(float)xradius,2)));
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| 167 | if (yo>y) pSelection[x + y * head.biWidth] = level;
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| 168 | }
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| 169 | }
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| 170 | return true;
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| 171 | }
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| 172 | ////////////////////////////////////////////////////////////////////////////////
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| 173 | /**
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| 174 | * Inverts the selection.
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| 175 | * Note: the SelectionBox is set to "full image", call SelectionGetBox before (if necessary)
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| 176 | */
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| 177 | bool CxImage::SelectionInvert()
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| 178 | {
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| 179 | if (pSelection) {
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| 180 | BYTE *iSrc=pSelection;
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| 181 | long n=head.biHeight*head.biWidth;
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| 182 | for(long i=0; i < n; i++){
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| 183 | *iSrc=(BYTE)~(*(iSrc));
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| 184 | iSrc++;
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| 185 | }
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| 186 |
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| 187 | SelectionRebuildBox();
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| 188 |
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| 189 | return true;
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| 190 | }
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| 191 | return false;
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| 192 | }
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| 193 | ////////////////////////////////////////////////////////////////////////////////
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| 194 | /**
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| 195 | * Imports an existing region from another image with the same width and height.
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| 196 | */
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| 197 | bool CxImage::SelectionCopy(CxImage &from)
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| 198 | {
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| 199 | if (from.pSelection == NULL || head.biWidth != from.head.biWidth || head.biHeight != from.head.biHeight) return false;
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| 200 | if (pSelection==NULL) pSelection = (BYTE*)malloc(head.biWidth * head.biHeight);
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| 201 | if (pSelection==NULL) return false;
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| 202 | memcpy(pSelection,from.pSelection,head.biWidth * head.biHeight);
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| 203 | memcpy(&info.rSelectionBox,&from.info.rSelectionBox,sizeof(RECT));
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| 204 | return true;
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| 205 | }
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| 206 | ////////////////////////////////////////////////////////////////////////////////
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| 207 | /**
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| 208 | * Adds a polygonal region to the existing selection. points points to an array of POINT structures.
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| 209 | * Each structure specifies the x-coordinate and y-coordinate of one vertex of the polygon.
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| 210 | * npoints specifies the number of POINT structures in the array pointed to by points.
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| 211 | */
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| 212 | bool CxImage::SelectionAddPolygon(POINT *points, long npoints, BYTE level)
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| 213 | {
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| 214 | if (points==NULL || npoints<3) return false;
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| 215 |
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| 216 | if (pSelection==NULL) SelectionCreate();
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| 217 | if (pSelection==NULL) return false;
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| 218 |
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| 219 | BYTE* plocal = (BYTE*)calloc(head.biWidth*head.biHeight, 1);
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| 220 | RECT localbox = {head.biWidth,0,0,head.biHeight};
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| 221 |
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| 222 | long x,y,i=0;
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| 223 | POINT *current;
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| 224 | POINT *next = NULL;
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| 225 | POINT *start = NULL;
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| 226 | //trace contour
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| 227 | while (i < npoints){
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| 228 | current = &points[i];
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| 229 | if (current->x!=-1){
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| 230 | if (i==0 || (i>0 && points[i-1].x==-1)) start = &points[i];
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| 231 |
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| 232 | if ((i+1)==npoints || points[i+1].x==-1)
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| 233 | next = start;
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| 234 | else
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| 235 | next = &points[i+1];
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| 236 |
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| 237 | float beta;
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| 238 | if (current->x != next->x){
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| 239 | beta = (float)(next->y - current->y)/(float)(next->x - current->x);
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| 240 | if (current->x < next->x){
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| 241 | for (x=current->x; x<=next->x; x++){
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| 242 | y = (long)(current->y + (x - current->x) * beta);
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| 243 | if (IsInside(x,y)) plocal[x + y * head.biWidth] = 255;
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| 244 | }
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| 245 | } else {
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| 246 | for (x=current->x; x>=next->x; x--){
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| 247 | y = (long)(current->y + (x - current->x) * beta);
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| 248 | if (IsInside(x,y)) plocal[x + y * head.biWidth] = 255;
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| 249 | }
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| 250 | }
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| 251 | }
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| 252 | if (current->y != next->y){
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| 253 | beta = (float)(next->x - current->x)/(float)(next->y - current->y);
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| 254 | if (current->y < next->y){
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| 255 | for (y=current->y; y<=next->y; y++){
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| 256 | x = (long)(current->x + (y - current->y) * beta);
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| 257 | if (IsInside(x,y)) plocal[x + y * head.biWidth] = 255;
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| 258 | }
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| 259 | } else {
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| 260 | for (y=current->y; y>=next->y; y--){
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| 261 | x = (long)(current->x + (y - current->y) * beta);
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| 262 | if (IsInside(x,y)) plocal[x + y * head.biWidth] = 255;
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| 263 | }
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| 264 | }
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| 265 | }
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| 266 | }
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| 267 |
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| 268 | RECT r2;
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| 269 | if (current->x < next->x) {r2.left=current->x; r2.right=next->x; } else {r2.left=next->x ; r2.right=current->x; }
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| 270 | if (current->y < next->y) {r2.bottom=current->y; r2.top=next->y; } else {r2.bottom=next->y ; r2.top=current->y; }
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| 271 | if (localbox.top < r2.top) localbox.top = max(0L,min(head.biHeight-1,r2.top+1));
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| 272 | if (localbox.left > r2.left) localbox.left = max(0L,min(head.biWidth-1,r2.left-1));
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| 273 | if (localbox.right < r2.right) localbox.right = max(0L,min(head.biWidth-1,r2.right+1));
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| 274 | if (localbox.bottom > r2.bottom) localbox.bottom = max(0L,min(head.biHeight-1,r2.bottom-1));
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| 275 |
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| 276 | i++;
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| 277 | }
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| 278 |
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| 279 | //fill the outer region
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| 280 | long npix=(localbox.right - localbox.left)*(localbox.top - localbox.bottom);
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| 281 | POINT* pix = (POINT*)calloc(npix,sizeof(POINT));
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| 282 | BYTE back=0, mark=1;
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| 283 | long fx, fy, fxx, fyy, first, last;
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| 284 | long xmin = 0;
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| 285 | long xmax = 0;
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| 286 | long ymin = 0;
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| 287 | long ymax = 0;
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| 288 |
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| 289 | for (int side=0; side<4; side++){
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| 290 | switch(side){
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| 291 | case 0:
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| 292 | xmin=localbox.left; xmax=localbox.right+1; ymin=localbox.bottom; ymax=localbox.bottom+1;
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| 293 | break;
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| 294 | case 1:
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| 295 | xmin=localbox.right; xmax=localbox.right+1; ymin=localbox.bottom; ymax=localbox.top+1;
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| 296 | break;
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| 297 | case 2:
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| 298 | xmin=localbox.left; xmax=localbox.right+1; ymin=localbox.top; ymax=localbox.top+1;
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| 299 | break;
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| 300 | case 3:
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| 301 | xmin=localbox.left; xmax=localbox.left+1; ymin=localbox.bottom; ymax=localbox.top+1;
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| 302 | break;
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| 303 | }
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| 304 | //fill from the border points
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| 305 | for(y=ymin;y<ymax;y++){
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| 306 | for(x=xmin;x<xmax;x++){
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| 307 | if (plocal[x+y*head.biWidth]==0){
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| 308 | // Subject: FLOOD FILL ROUTINE Date: 12-23-97 (00:57)
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| 309 | // Author: Petter Holmberg Code: QB, QBasic, PDS
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| 310 | // Origin: petter.holmberg@usa.net Packet: GRAPHICS.ABC
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| 311 | first=0;
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| 312 | last=1;
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| 313 | while(first!=last){
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| 314 | fx = pix[first].x;
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| 315 | fy = pix[first].y;
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| 316 | fxx = fx + x;
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| 317 | fyy = fy + y;
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| 318 | for(;;)
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| 319 | {
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| 320 | if ((plocal[fxx + fyy*head.biWidth] == back) &&
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| 321 | fxx>=localbox.left && fxx<=localbox.right && fyy>=localbox.bottom && fyy<=localbox.top )
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| 322 | {
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| 323 | plocal[fxx + fyy*head.biWidth] = mark;
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| 324 | if (fyy > 0 && plocal[fxx + (fyy - 1)*head.biWidth] == back){
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| 325 | pix[last].x = fx;
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| 326 | pix[last].y = fy - 1;
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| 327 | last++;
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| 328 | if (last == npix) last = 0;
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| 329 | }
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| 330 | if ((fyy + 1)<head.biHeight && plocal[fxx + (fyy + 1)*head.biWidth] == back){
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| 331 | pix[last].x = fx;
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| 332 | pix[last].y = fy + 1;
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| 333 | last++;
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| 334 | if (last == npix) last = 0;
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| 335 | }
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| 336 | } else {
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| 337 | break;
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| 338 | }
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| 339 | fx++;
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| 340 | fxx++;
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| 341 | };
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| 342 |
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| 343 | fx = pix[first].x - 1;
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| 344 | fy = pix[first].y;
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| 345 | fxx = fx + x;
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| 346 | fyy = fy + y;
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| 347 |
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| 348 | for( ;; )
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| 349 | {
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| 350 | if ((plocal[fxx + fyy*head.biWidth] == back) &&
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| 351 | fxx>=localbox.left && fxx<=localbox.right && fyy>=localbox.bottom && fyy<=localbox.top )
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| 352 | {
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| 353 | plocal[fxx + (y + fy)*head.biWidth] = mark;
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| 354 | if (fyy > 0 && plocal[fxx + (fyy - 1)*head.biWidth] == back){
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| 355 | pix[last].x = fx;
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| 356 | pix[last].y = fy - 1;
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| 357 | last++;
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| 358 | if (last == npix) last = 0;
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| 359 | }
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| 360 | if ((fyy + 1)<head.biHeight && plocal[fxx + (fyy + 1)*head.biWidth] == back){
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| 361 | pix[last].x = fx;
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| 362 | pix[last].y = fy + 1;
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| 363 | last++;
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| 364 | if (last == npix) last = 0;
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| 365 | }
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| 366 | } else {
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| 367 | break;
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| 368 | }
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| 369 | fx--;
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| 370 | fxx--;
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| 371 | }
|
|---|
| 372 |
|
|---|
| 373 | first++;
|
|---|
| 374 | if (first == npix) first = 0;
|
|---|
| 375 | }
|
|---|
| 376 | }
|
|---|
| 377 | }
|
|---|
| 378 | }
|
|---|
| 379 | }
|
|---|
| 380 |
|
|---|
| 381 | //transfer the region
|
|---|
| 382 | long yoffset;
|
|---|
| 383 | for (y=localbox.bottom; y<=localbox.top; y++){
|
|---|
| 384 | yoffset = y * head.biWidth;
|
|---|
| 385 | for (x=localbox.left; x<=localbox.right; x++)
|
|---|
| 386 | if (plocal[x + yoffset]!=1) pSelection[x + yoffset]=level;
|
|---|
| 387 | }
|
|---|
| 388 | if (info.rSelectionBox.top <= localbox.top) info.rSelectionBox.top = min(head.biHeight,localbox.top + 1);
|
|---|
| 389 | if (info.rSelectionBox.left > localbox.left) info.rSelectionBox.left = min(head.biWidth,localbox.left);
|
|---|
| 390 | if (info.rSelectionBox.right <= localbox.right) info.rSelectionBox.right = min(head.biWidth,localbox.right + 1);
|
|---|
| 391 | if (info.rSelectionBox.bottom > localbox.bottom) info.rSelectionBox.bottom = min(head.biHeight,localbox.bottom);
|
|---|
| 392 |
|
|---|
| 393 | free(plocal);
|
|---|
| 394 | free(pix);
|
|---|
| 395 |
|
|---|
| 396 | return true;
|
|---|
| 397 | }
|
|---|
| 398 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 399 | /**
|
|---|
| 400 | * Adds to the selection all the pixels matching the specified color.
|
|---|
| 401 | */
|
|---|
| 402 | bool CxImage::SelectionAddColor(RGBQUAD c, BYTE level)
|
|---|
| 403 | {
|
|---|
| 404 | if (pSelection==NULL) SelectionCreate();
|
|---|
| 405 | if (pSelection==NULL) return false;
|
|---|
| 406 |
|
|---|
| 407 | RECT localbox = {head.biWidth,0,0,head.biHeight};
|
|---|
| 408 |
|
|---|
| 409 | for (long y = 0; y < head.biHeight; y++){
|
|---|
| 410 | for (long x = 0; x < head.biWidth; x++){
|
|---|
| 411 | RGBQUAD color = BlindGetPixelColor(x, y);
|
|---|
| 412 | if (color.rgbRed == c.rgbRed &&
|
|---|
| 413 | color.rgbGreen == c.rgbGreen &&
|
|---|
| 414 | color.rgbBlue == c.rgbBlue)
|
|---|
| 415 | {
|
|---|
| 416 | pSelection[x + y * head.biWidth] = level;
|
|---|
| 417 |
|
|---|
| 418 | if (localbox.top < y) localbox.top = y;
|
|---|
| 419 | if (localbox.left > x) localbox.left = x;
|
|---|
| 420 | if (localbox.right < x) localbox.right = x;
|
|---|
| 421 | if (localbox.bottom > y) localbox.bottom = y;
|
|---|
| 422 | }
|
|---|
| 423 | }
|
|---|
| 424 | }
|
|---|
| 425 |
|
|---|
| 426 | if (info.rSelectionBox.top <= localbox.top) info.rSelectionBox.top = localbox.top + 1;
|
|---|
| 427 | if (info.rSelectionBox.left > localbox.left) info.rSelectionBox.left = localbox.left;
|
|---|
| 428 | if (info.rSelectionBox.right <= localbox.right) info.rSelectionBox.right = localbox.right + 1;
|
|---|
| 429 | if (info.rSelectionBox.bottom > localbox.bottom) info.rSelectionBox.bottom = localbox.bottom;
|
|---|
| 430 |
|
|---|
| 431 | return true;
|
|---|
| 432 | }
|
|---|
| 433 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 434 | /**
|
|---|
| 435 | * Adds a single pixel to the existing selection.
|
|---|
| 436 | */
|
|---|
| 437 | bool CxImage::SelectionAddPixel(long x, long y, BYTE level)
|
|---|
| 438 | {
|
|---|
| 439 | if (pSelection==NULL) SelectionCreate();
|
|---|
| 440 | if (pSelection==NULL) return false;
|
|---|
| 441 |
|
|---|
| 442 | if (IsInside(x,y)) {
|
|---|
| 443 | pSelection[x + y * head.biWidth] = level; // set the correct mask bit
|
|---|
| 444 |
|
|---|
| 445 | if (info.rSelectionBox.top <= y) info.rSelectionBox.top = y+1;
|
|---|
| 446 | if (info.rSelectionBox.left > x) info.rSelectionBox.left = x;
|
|---|
| 447 | if (info.rSelectionBox.right <= x) info.rSelectionBox.right = x+1;
|
|---|
| 448 | if (info.rSelectionBox.bottom > y) info.rSelectionBox.bottom = y;
|
|---|
| 449 |
|
|---|
| 450 | return true;
|
|---|
| 451 | }
|
|---|
| 452 |
|
|---|
| 453 | return false;
|
|---|
| 454 | }
|
|---|
| 455 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 456 | /**
|
|---|
| 457 | * Exports the selection channel in a 8bpp grayscale image.
|
|---|
| 458 | */
|
|---|
| 459 | bool CxImage::SelectionSplit(CxImage *dest)
|
|---|
| 460 | {
|
|---|
| 461 | if (!pSelection || !dest) return false;
|
|---|
| 462 |
|
|---|
| 463 | CxImage tmp(head.biWidth,head.biHeight,8);
|
|---|
| 464 | if (!tmp.IsValid()){
|
|---|
| 465 | strcpy(info.szLastError,tmp.GetLastError());
|
|---|
| 466 | return false;
|
|---|
| 467 | }
|
|---|
| 468 |
|
|---|
| 469 | for(long y=0; y<head.biHeight; y++){
|
|---|
| 470 | for(long x=0; x<head.biWidth; x++){
|
|---|
| 471 | tmp.BlindSetPixelIndex(x,y,pSelection[x+y*head.biWidth]);
|
|---|
| 472 | }
|
|---|
| 473 | }
|
|---|
| 474 |
|
|---|
| 475 | tmp.SetGrayPalette();
|
|---|
| 476 | dest->Transfer(tmp);
|
|---|
| 477 |
|
|---|
| 478 | return true;
|
|---|
| 479 | }
|
|---|
| 480 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 481 | /**
|
|---|
| 482 | * Creates the selection channel from a gray scale image.
|
|---|
| 483 | * black = unselected
|
|---|
| 484 | */
|
|---|
| 485 | bool CxImage::SelectionSet(CxImage &from)
|
|---|
| 486 | {
|
|---|
| 487 | if (!from.IsGrayScale() || head.biWidth != from.head.biWidth || head.biHeight != from.head.biHeight){
|
|---|
| 488 | strcpy(info.szLastError,"CxImage::SelectionSet: wrong width or height, or image is not gray scale");
|
|---|
| 489 | return false;
|
|---|
| 490 | }
|
|---|
| 491 |
|
|---|
| 492 | if (pSelection==NULL) pSelection = (BYTE*)malloc(head.biWidth * head.biHeight);
|
|---|
| 493 |
|
|---|
| 494 | BYTE* src = from.info.pImage;
|
|---|
| 495 | BYTE* dst = pSelection;
|
|---|
| 496 | if (src==NULL || dst==NULL){
|
|---|
| 497 | strcpy(info.szLastError,"CxImage::SelectionSet: null pointer");
|
|---|
| 498 | return false;
|
|---|
| 499 | }
|
|---|
| 500 |
|
|---|
| 501 | for (long y=0; y<head.biHeight; y++){
|
|---|
| 502 | memcpy(dst,src,head.biWidth);
|
|---|
| 503 | dst += head.biWidth;
|
|---|
| 504 | src += from.info.dwEffWidth;
|
|---|
| 505 | }
|
|---|
| 506 |
|
|---|
| 507 | SelectionRebuildBox();
|
|---|
| 508 |
|
|---|
| 509 | return true;
|
|---|
| 510 | }
|
|---|
| 511 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 512 | /**
|
|---|
| 513 | * Sets the Selection level for a single pixel
|
|---|
| 514 | * internal use only: doesn't set SelectionBox. Use SelectionAddPixel
|
|---|
| 515 | */
|
|---|
| 516 | void CxImage::SelectionSet(const long x,const long y,const BYTE level)
|
|---|
| 517 | {
|
|---|
| 518 | if (pSelection && IsInside(x,y)) pSelection[x+y*head.biWidth]=level;
|
|---|
| 519 | }
|
|---|
| 520 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 521 | /**
|
|---|
| 522 | * Gets the Selection level for a single pixel
|
|---|
| 523 | */
|
|---|
| 524 | BYTE CxImage::SelectionGet(const long x,const long y)
|
|---|
| 525 | {
|
|---|
| 526 | if (pSelection && IsInside(x,y)) return pSelection[x+y*head.biWidth];
|
|---|
| 527 | return 0;
|
|---|
| 528 | }
|
|---|
| 529 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 530 | /**
|
|---|
| 531 | * Rebuilds the SelectionBox
|
|---|
| 532 | */
|
|---|
| 533 | void CxImage::SelectionRebuildBox()
|
|---|
| 534 | {
|
|---|
| 535 | info.rSelectionBox.left = head.biWidth;
|
|---|
| 536 | info.rSelectionBox.bottom = head.biHeight;
|
|---|
| 537 | info.rSelectionBox.right = info.rSelectionBox.top = 0;
|
|---|
| 538 |
|
|---|
| 539 | if (!pSelection)
|
|---|
| 540 | return;
|
|---|
| 541 |
|
|---|
| 542 | long x,y;
|
|---|
| 543 |
|
|---|
| 544 | for (y=0; y<head.biHeight; y++){
|
|---|
| 545 | for (x=0; x<info.rSelectionBox.left; x++){
|
|---|
| 546 | if (pSelection[x+y*head.biWidth]){
|
|---|
| 547 | info.rSelectionBox.left = x;
|
|---|
| 548 | continue;
|
|---|
| 549 | }
|
|---|
| 550 | }
|
|---|
| 551 | }
|
|---|
| 552 |
|
|---|
| 553 | for (y=0; y<head.biHeight; y++){
|
|---|
| 554 | for (x=head.biWidth-1; x>=info.rSelectionBox.right; x--){
|
|---|
| 555 | if (pSelection[x+y*head.biWidth]){
|
|---|
| 556 | info.rSelectionBox.right = x+1;
|
|---|
| 557 | continue;
|
|---|
| 558 | }
|
|---|
| 559 | }
|
|---|
| 560 | }
|
|---|
| 561 |
|
|---|
| 562 | for (x=0; x<head.biWidth; x++){
|
|---|
| 563 | for (y=0; y<info.rSelectionBox.bottom; y++){
|
|---|
| 564 | if (pSelection[x+y*head.biWidth]){
|
|---|
| 565 | info.rSelectionBox.bottom = y;
|
|---|
| 566 | continue;
|
|---|
| 567 | }
|
|---|
| 568 | }
|
|---|
| 569 | }
|
|---|
| 570 |
|
|---|
| 571 | for (x=0; x<head.biWidth; x++){
|
|---|
| 572 | for (y=head.biHeight-1; y>=info.rSelectionBox.top; y--){
|
|---|
| 573 | if (pSelection[x+y*head.biWidth]){
|
|---|
| 574 | info.rSelectionBox.top = y+1;
|
|---|
| 575 | continue;
|
|---|
| 576 | }
|
|---|
| 577 | }
|
|---|
| 578 | }
|
|---|
| 579 |
|
|---|
| 580 | }
|
|---|
| 581 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 582 | /**
|
|---|
| 583 | * Gets the Selection level for a single pixel
|
|---|
| 584 | * "blind" version assumes that (x,y) is inside to the image.
|
|---|
| 585 | */
|
|---|
| 586 | BYTE CxImage::BlindSelectionGet(const long x,const long y)
|
|---|
| 587 | {
|
|---|
| 588 | #ifdef _DEBUG
|
|---|
| 589 | if (!IsInside(x,y) || (pSelection==0))
|
|---|
| 590 | #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
|
|---|
| 591 | throw 0;
|
|---|
| 592 | #else
|
|---|
| 593 | return 0;
|
|---|
| 594 | #endif
|
|---|
| 595 | #endif
|
|---|
| 596 | return pSelection[x+y*head.biWidth];
|
|---|
| 597 | }
|
|---|
| 598 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 599 | /**
|
|---|
| 600 | * Returns pointer to selection data for pixel (x,y).
|
|---|
| 601 | */
|
|---|
| 602 | BYTE* CxImage::SelectionGetPointer(const long x,const long y)
|
|---|
| 603 | {
|
|---|
| 604 | if (pSelection && IsInside(x,y)) return pSelection+x+y*head.biWidth;
|
|---|
| 605 | return 0;
|
|---|
| 606 | }
|
|---|
| 607 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 608 | bool CxImage::SelectionFlip()
|
|---|
| 609 | {
|
|---|
| 610 | if (!pSelection) return false;
|
|---|
| 611 |
|
|---|
| 612 | BYTE *buff = (BYTE*)malloc(head.biWidth);
|
|---|
| 613 | if (!buff) return false;
|
|---|
| 614 |
|
|---|
| 615 | BYTE *iSrc,*iDst;
|
|---|
| 616 | iSrc = pSelection + (head.biHeight-1)*head.biWidth;
|
|---|
| 617 | iDst = pSelection;
|
|---|
| 618 | for (long i=0; i<(head.biHeight/2); ++i)
|
|---|
| 619 | {
|
|---|
| 620 | memcpy(buff, iSrc, head.biWidth);
|
|---|
| 621 | memcpy(iSrc, iDst, head.biWidth);
|
|---|
| 622 | memcpy(iDst, buff, head.biWidth);
|
|---|
| 623 | iSrc-=head.biWidth;
|
|---|
| 624 | iDst+=head.biWidth;
|
|---|
| 625 | }
|
|---|
| 626 |
|
|---|
| 627 | free(buff);
|
|---|
| 628 |
|
|---|
| 629 | long top = info.rSelectionBox.top;
|
|---|
| 630 | info.rSelectionBox.top = head.biHeight - info.rSelectionBox.bottom;
|
|---|
| 631 | info.rSelectionBox.bottom = head.biHeight - top;
|
|---|
| 632 | return true;
|
|---|
| 633 | }
|
|---|
| 634 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 635 | bool CxImage::SelectionMirror()
|
|---|
| 636 | {
|
|---|
| 637 | if (!pSelection) return false;
|
|---|
| 638 | BYTE* pSelection2 = (BYTE*)malloc(head.biWidth * head.biHeight);
|
|---|
| 639 | if (!pSelection2) return false;
|
|---|
| 640 |
|
|---|
| 641 | BYTE *iSrc,*iDst;
|
|---|
| 642 | long wdt=head.biWidth-1;
|
|---|
| 643 | iSrc=pSelection + wdt;
|
|---|
| 644 | iDst=pSelection2;
|
|---|
| 645 | for(long y=0; y < head.biHeight; y++){
|
|---|
| 646 | for(long x=0; x <= wdt; x++)
|
|---|
| 647 | *(iDst+x)=*(iSrc-x);
|
|---|
| 648 | iSrc+=head.biWidth;
|
|---|
| 649 | iDst+=head.biWidth;
|
|---|
| 650 | }
|
|---|
| 651 | free(pSelection);
|
|---|
| 652 | pSelection=pSelection2;
|
|---|
| 653 |
|
|---|
| 654 | long left = info.rSelectionBox.left;
|
|---|
| 655 | info.rSelectionBox.left = head.biWidth - info.rSelectionBox.right;
|
|---|
| 656 | info.rSelectionBox.right = head.biWidth - left;
|
|---|
| 657 | return true;
|
|---|
| 658 | }
|
|---|
| 659 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 660 | #if CXIMAGE_SUPPORT_WINDOWS
|
|---|
| 661 | /**
|
|---|
| 662 | * Converts the selection in a HRGN object.
|
|---|
| 663 | */
|
|---|
| 664 | bool CxImage::SelectionToHRGN(HRGN& region)
|
|---|
| 665 | {
|
|---|
| 666 | if (pSelection && region){
|
|---|
| 667 | for(int y = 0; y < head.biHeight; y++){
|
|---|
| 668 | HRGN hTemp = NULL;
|
|---|
| 669 | int iStart = -1;
|
|---|
| 670 | int x = 0;
|
|---|
| 671 | for(; x < head.biWidth; x++){
|
|---|
| 672 | if (pSelection[x + y * head.biWidth] != 0){
|
|---|
| 673 | if (iStart == -1) iStart = x;
|
|---|
| 674 | continue;
|
|---|
| 675 | }else{
|
|---|
| 676 | if (iStart >= 0){
|
|---|
| 677 | hTemp = CreateRectRgn(iStart, y, x, y + 1);
|
|---|
| 678 | CombineRgn(region, hTemp, region, RGN_OR);
|
|---|
| 679 | DeleteObject(hTemp);
|
|---|
| 680 | iStart = -1;
|
|---|
| 681 | }
|
|---|
| 682 | }
|
|---|
| 683 | }
|
|---|
| 684 | if (iStart >= 0){
|
|---|
| 685 | hTemp = CreateRectRgn(iStart, y, x, y + 1);
|
|---|
| 686 | CombineRgn(region, hTemp, region, RGN_OR);
|
|---|
| 687 | DeleteObject(hTemp);
|
|---|
| 688 | iStart = -1;
|
|---|
| 689 | }
|
|---|
| 690 | }
|
|---|
| 691 | return true;
|
|---|
| 692 | }
|
|---|
| 693 | return false;
|
|---|
| 694 | }
|
|---|
| 695 | #endif //CXIMAGE_SUPPORT_WINDOWS
|
|---|
| 696 | ////////////////////////////////////////////////////////////////////////////////
|
|---|
| 697 | #endif //CXIMAGE_SUPPORT_SELECTION
|
|---|
